Watsonia is a genus of plants in the iris family, subfamily Crocoideae, native to South Africa. The genus is named after Sir William Watson, a British botanist. There are 52 species in southern Africa; all are perennial herbs growing from corms and producing erect spikes of showy flowers, and are adapted to a mediterranean-type climate. The most common species in cultivation is the pink-flowered Watsonia borbonica and its white mutant ‘Arderne’s White’. These were crossed with Watsonia meriana and other species in the early 20th century by breeders including John Cronin in Australia and Luther Burbank in California to produce a wide range of cultivars. Watsonia has been eclipsed in popularity by Gladiolus and other bulbs, and is now neglected by the nursery industry. In the South-West of Western Australia, six species have become naturalised from garden escapes along rivers, wetlands and seasonally wet ground.

Watsonia occulta is a South African indigenous perennial geophyte found in the Mpumalanga province, extending into Eswatini where it grows in mountain grassland. Growing from 18 to 40 cm, during summer it has bilaterally symmetrical white flowers with a long tube and long floral bracts that clasp and conceal the stem.